Aluminum 5254-H26
Supply condition
AA 5254 · UNS A95254
H26 = strain hardened and partially annealed, three-quarter hard
Three-quarter hard with slightly better formability than H16.
Values for the H26 condition
Other 5254 tempers and conditions
5254 is listed in 14 conditions; see the grade overview at 5254.
Compare all 14 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for deep drawing, spinning and tank heads, and for maximum resistance to sensitisation-related SCC. | 115 | 240 | 27 | 58 HB | 33 % IACS |
Strain hardened from hot working only | Standard temper for hot-rolled thick plate used in welded peroxide tanks and pressure vessels. | 115 | 240 | 25 | 63 HB | 33 % IACS |
Strain hardened and partially annealed, quarter hard | Over-worked then back-annealed to 1/4 hard; better ductility than H12 at similar strength. | 200 | 265 | 15 | 66 HB | 32 % IACS |
H32Default Strain hardened and stabilized, quarter hard | The standard stocked sheet/plate temper: good strength, still formable and weldable, with a stabilising anneal that locks in properties for Mg-bearing alloys. | 205 | 270 | 15 | 67 HB | 32 % IACS |
Strain hardened, quarter hard | Light cold work when a little extra strength is wanted but good bending is still needed; for 5254 usually superseded by the stabilised H32. | 210 | 270 | 13 | 67 HB | 32 % IACS |
Strain hardened and partially annealed, half hard | Half-hard with retained bendability — a common choice for formed vessel components. | 220 | 285 | 12 | 72 HB | 32 % IACS |
Strain hardened and stabilized, half hard | Half-hard stabilised sheet where higher yield strength is needed and bend radii can be generous. | 230 | 290 | 13 | 73 HB | 32 % IACS |
Strain hardened, half hard | Mid-hard cold-rolled sheet for moderately formed, higher-strength parts. | 240 | 290 | 10 | 73 HB | 32 % IACS |
H26This page Strain hardened and partially annealed, three-quarter hard | Three-quarter hard with slightly better formability than H16. | 245 | 305 | 10 | 77 HB | 32 % IACS |
Strain hardened and stabilized, three-quarter hard | Three-quarter hard stabilised sheet for strength-driven flat components. | 250 | 310 | 12 | 78 HB | 32 % IACS |
Strain hardened, three-quarter hard | High-strength cold-rolled sheet for flat or lightly formed panels. | 260 | 310 | 8 | 78 HB | 32 % IACS |
Strain hardened and partially annealed, full hard | Full-hard partially annealed sheet; highest strength available in thin gauge. | 265 | 325 | 7 | 80 HB | 32 % IACS |
Strain hardened and stabilized, full hard | Highest-strength stabilised temper; use only where forming and welding are minimal. | 270 | 330 | 10 | 80 HB | 32 % IACS |
Strain hardened, full hard | Maximum cold-worked strength, minimum ductility; flat product only, essentially no bending. | 285 | 330 | 6 | 82 HB | 32 % IACS |
What is 5254-H26?
5254-H26 is 5254 supplied in the H26 condition — three-quarter hard with slightly better formability than H16. 5254-H26 has a yield strength of 245 MPa (35.5 ksi) and a tensile strength of 305 MPa (44.2 ksi) — stronger than 64% of aluminum grades. Elongation at break is 10% and the elastic modulus is 70.3 GPa (10.2 Msi). 5254-H26 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 593°C (1,099 °F). H32 is the default condition FabDigit quotes; H26 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 79/100, better than 96% of aluminum grades
- Polishes to a fine finish — 70/100, better than 87% of aluminum grades
- Readily welded — 87/100, better than 82% of aluminum grades
Limitations
- Limited service temperature — 65°C (149 °F), worse than 97% of aluminum grades
5254-H26 properties
Typical room-temperature values for 5254-H26; 19 are specific to this condition. Other listed values are 5254 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5254-H26 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 593°C (1,099 °F).
Mechanical11
5254-H26 has a yield strength of 245 MPa (35.5 ksi) and a tensile strength of 305 MPa (44.2 ksi) — stronger than 64% of aluminum grades. Elongation at break is 10% and the elastic modulus is 70.3 GPa (10.2 Msi).
Thermal6
5254-H26 is rated for continuous service to 65°C (149 °F). It conducts heat at 126 W/m·K (72.8 BTU/hr·ft·°F), worse than 70% of aluminum grades. Thermal expansion is 23.9 µm/m·K (13.3 µin/in·°F).
Electrical3
5254-H26 conducts electricity at 32 % IACS, worse than 63% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (79/100), better than 96% of aluminum grades.
Sustainability4
Producing a kilogram of 5254-H26 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 20%.
Manufacturability8
5254-H26's machinability is fair (50/100, worse than 65% of aluminum grades); weldability excellent (87/100); formability fair (42/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5254-H26
Is 5254 easy to machine?
Gummy like all soft 5000 series — use sharp polished high-rake carbide, high surface speed, generous non-chlorinated coolant to avoid built-up edge; keep tooling free of iron/copper contamination for peroxide service.
Can 5254 be welded?
Readily GTAW/GMAW welded with 5356 or 5654 filler (5654 preferred for peroxide purity); as-welded joint strength approaches the O-temper level, so design to annealed properties.
Can 5254 be formed, bent or molded?
Excellent cold formability in O/H32; allow generous bend radii in H34 and above and avoid heating above ~65 °C in service after forming to prevent β-phase sensitisation.
What surface finishes work on 5254?
Anodises clear or hard with good uniformity; chemical cleaning and passivation of the surface is normally required before hydrogen-peroxide service to remove embedded iron and machining debris.
5254 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| SiSi + Fe combined 0.45 max | ≤ 0.45 | — |
| FeSi + Fe combined 0.45 max | ≤ 0.45 | — |
| Cuheld low to avoid catalysing H2O2 decomposition | ≤ 0.05 | — |
| Mnkey difference vs 5154 | ≤ 0.01 | — |
| Mg | 3.1 – 3.9 | 3.5 |
| Cr | 0.15 – 0.35 | 0.25 |
| Zn | ≤ 0.2 | — |
| Ti | ≤ 0.05 | — |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
5254-H26 — frequently asked
What is 5254-H26 used for?
5254-H26 is typically used for hydrogen peroxide tanks, chemical storage vessels and purity-critical piping. In short: peroxide-service Al-Mg alloy; high-purity, low-copper 5154; 80-rated corrosion resistance.
What is the yield strength of 5254-H26?
5254-H26 has a typical yield strength of 245 MPa (35.5 ksi) and a tensile strength of 305 MPa (44.2 ksi) — stronger than 64% of aluminum grades. Strength varies by condition: see the 14 listed tempers.
Is 5254-H26 easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 65% of aluminum grades). Gummy like all soft 5000 series — use sharp polished high-rake carbide, high surface speed, generous non-chlorinated coolant to avoid built-up edge; keep tooling free of iron/copper contamination for peroxide service.
Can 5254-H26 be welded?
Yes — weldability is rated excellent (87/100). Readily GTAW/GMAW welded with 5356 or 5654 filler (5654 preferred for peroxide purity); as-welded joint strength approaches the O-temper level, so design to annealed properties.
What surface finishes work on 5254-H26?
Anodises clear or hard with good uniformity; chemical cleaning and passivation of the surface is normally required before hydrogen-peroxide service to remove embedded iron and machining debris.
Can 5254-H26 be formed, bent or molded?
Excellent cold formability in O/H32; allow generous bend radii in H34 and above and avoid heating above ~65 °C in service after forming to prevent β-phase sensitisation.
What is the maximum service temperature of 5254-H26?
5254-H26 is rated for continuous use to about 65°C (149 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 5254-H32 and 5254-O?
H32 is the default condition — the standard stocked sheet/plate temper: good strength, still formable and weldable, with a stabilising anneal that locks in properties for Mg-bearing alloys. O: pick for deep drawing, spinning and tank heads, and for maximum resistance to sensitisation-related SCC. Yield strength is 205 MPa in H32 versus 115 MPa in O.
Sources
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- ASTM B209 — Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate — ASTM International (2021)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- Aluminum Standards and Data — The Aluminum Association (2017)
- MMPDS / typical wrought aluminium physical property tables — Battelle (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.